Beneficial Use of Iowa Waste Ashes in Concrete through Carbon Sequestration

Wang, Kejin; Lee, Yunsu

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Beneficial Use of Iowa Waste Ashes in Concrete through Carbon Sequestration

2025-01-01
By Wang, Kejin ; Lee, Yunsu

File Language:

English

[PDF - 10.29 MB]

Details

Creators:

Wang, Kejin ; Lee, Yunsu
Corporate Creators:

Iowa State University. Institute for Transportation
Corporate Contributors:

Iowa Highway Research Board ; Iowa. Department of Transportation
Subject/TRT Terms:
Publication/ Report Number:

IHRB Project TR-807
Resource Type:

Tech Report
Geographical Coverage:

United States;Iowa
Edition:

Final Report
Corporate Publisher:

Iowa State University. Institute for Transportation
Abstract:

A significant amount of waste ash in the United States does not meet the necessary specifications for construction and other uses, and power plants are searching for a way to dispose of surplus waste ashes. To address this issue, this research aimed to treat waste ashes using CO2 injection in order to modify their properties and enable their beneficial use in concrete. The main tasks of the study were to (1) optimize the carbon treatment procedure (pressure, moisture, and time) for the selected waste ashes, (2) determine the effects of the carbon treatment on the properties of the ashes (surface chemistry, morphology, pore structure, etc.), (3) evaluate the effects of carbon-treated ashes on the properties of cement composites such as paste and mortar (set time, flowability, hydration, strength, etc.), and (4) quantify CO2 sequestration and assess the benefit-to-cost potential of the carbon-curing treatment. Findings indicate that certain types of waste ashes can increase the decarbonation of cement and concrete providing a use for the waste ashes and promoting sustainability.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/82809/dot_82809_DS1.pdf
File Type:

[PDF - 10.29 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:20614e76ea26684dc0dd25faf6d1b569db01a1436181ef89ab238bd6add7df3d8a38f2050055fdd5e663a1b1a89c756c072f518898906d18871fb910ee9a77d7

File Language:

English

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